Inventor · disambiguated record
David R. Underdown
Also filed as: UNDERDOWN DAVID · UNDERDOWN DAVID R · UNDERDOWN DAVID REUEL
16 granted patents·11 pending applications·544 citations·filing 1983–2021
94Inventor score
Files withCHEVRON USA INC8ATLANTIC RICHFIELD CO3BAKER OIL TOOLS INC3TOSI LUIS PHILLIPE3CHEVRON U S A INC A CORP OF PE1
Top patents by PatentIndex Score
27 records- 0195US4564459AProppant charge and methodBAKER OIL TOOLS INC·Filed 1984·Granted Jan 14, 1986·145 cites·2 claims
- 0295US4443347AProppant charge and methodBAKER OIL TOOLS INC·Filed 1983·Granted Apr 17, 1984·124 cites·1 claims
- 0390US4664819AProppant charge and methodBAKER OIL TOOLS INC·Filed 1985·Granted May 12, 1987·90 cites·4 claims
- 0487US8714239B2Flow-induced electrostatic power generator for downhole use in oil and gas wellsTOSI LUIS PHILLIPE·Filed 2011·Granted May 6, 2014·7 cites·20 claims
- 0587US8511373B2Flow-induced electrostatic power generator for downhole use in oil and gas wellsTOSI LUIS PHILLIPE·Filed 2011·Granted Aug 20, 2013·13 cites·20 claims
- 0678US4627496ASqueeze cement method using coiled tubingATLANTIC RICHFIELD CO·Filed 1985·Granted Dec 9, 1986·62 cites·21 claims
- 0773US12352136B2Downhole sand control screen systemCHEVRON USA INC·Filed 2021·Granted Jul 8, 2025·0 cites·12 claims
- 0873US9685890B2Flow induced electrostatic power generator for tubular segmentsCHEVRON USA INC·Filed 2014·Granted Jun 20, 2017·4 cites·18 claims
- 0973US6502635B1Sub-sea membrane separation system with temperature controlCHEVRON USA INC·Filed 2001·Granted Jan 7, 2003·18 cites·43 claims
- 1073US4741400AMethod for scale inhibition in a well penetrating a subterranean formationATLANTIC RICHFIELD CO·Filed 1986·Granted May 3, 1988·33 cites·11 claims
- 1168US11174711B2Methods of coating a sand screen componentCHEVRON USA INC·Filed 2018·Granted Nov 16, 2021·0 cites·8 claims
- 1264US5171460AMethod for preventing metal carbonate scale formation in a well penetrating a subterranean formationATLANTIC RICHFIELD CO·Filed 1991·Granted Dec 15, 1992·19 cites·13 claims
- 1358US9371719B2Controlling pressure during perforating operationsUNDERDOWN DAVID·Filed 2014·Granted Jun 21, 2016·2 cites·20 claims
- 1457US6454836B1Method and apparatus for wellbore gas separationCHEVRON USA INC·Filed 2000·Granted Sep 24, 2002·26 cites·32 claims
- 1556US9068431B2Flow sensing apparatus and methods for use in oil and gas wellsTOSI LUIS PHILLIPE·Filed 2012·Granted Jun 30, 2015·1 cites·15 claims
- 1646US9556712B2Flow induced electrostatic power generator for tubular segmentsCHEVRON USA INC·Filed 2014·Granted Jan 31, 2017·0 cites·17 claims
- 1744US2015152716A1Method, System and Apparatus of Erosion Resistant Filtering Screen StructuresKIM NAMHYO·Filed 2013·Application pending·0 cites
- 1840US2013087336A1System And Method Of Perforating A Well And Preparing A Perforating Fluid For The SameUNDERDOWN DAVID R·Filed 2011·Application pending·0 cites
- 1938US2017362922A1Filter Media For Sand Control Screen AssembliesCHEVRON USA INC·Filed 2016·Application pending·0 cites
- 2038US2012111580A1Tool and method for placement of a component into a wellMARTIN FRASER G·Filed 2010·Application pending·0 cites
- 2138US2002195250A1System and method for separation of hydrocarbons and contaminants using redundant membrane separatorsFiled 2001·Application pending·0 cites
- 2238US2003080061A1Method and system utilizing gravity and membranes to separate water and oil in a horizontal wellboreFiled 2001·Application pending·0 cites
- 2338US2018171750A1Compositions And Methods For Controlled Break Of Fluid-Loss Barriers Post-PerforationCHEVRON USA INC·Filed 2017·Application pending·0 cites
- 2433US2002084073A1Separation string for the separation of hydrocarbon from contaminants in a wellbore and method of assembling sameFiled 2000·Application pending·0 cites
- 2533US2003079876A1Method and system for regeneration of a membrane used to separate fluids in a wellboreFiled 2001·Application pending·0 cites
- 2626US2002189807A1Method and system for oil and water separation utilizing a hydrostatic pressure head for disposal of waterCHEVRON U S A INC A CORP OF PE·Filed 2001·Application pending·0 cites
- 2726US2003037923A1Method of maintaining water volume in an oil strata of an oil production reservoirFiled 2001·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →